The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 11, 1978
Filed:
Apr. 19, 1974
Applicant:
Inventors:
Myron J Krupp, Grafton, WI (US);
Gerald R Gacesa, Franklin, WI (US);
John P Knudtson, Franklin, WI (US);
Assignee:
PPG Industries, Inc., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25D / ;
U.S. Cl.
CPC ...
2041 / ;
Abstract
This invention relates to novel stain-resistant electrodepositable compositions. It has been found that electrodepositable resins, and especially those resins which are mixed fatty acid partial esters of high molecular weight polyols have a tendency to develop a stain when electrodeposited over an iron-containing substrate. This staining problem is eliminated or greatly reduced by use of a complex organic polyphosphoric ester acid anhydride.